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Backup attitude indicator on older Cirrus



 
 
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  #1  
Old April 12th 08, 02:56 AM posted to rec.aviation.owning
[email protected][_1_]
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Posts: 28
Default Backup attitude indicator on older Cirrus

Has anyone seen an installation of a backup attitude indicator in an
older Cirrus without the PFD? Every panel I've seen has the same
layout, and there doesn't appear to be any extra space. It looks like
an HSI could be installed and the space for the CDI/Glideslope could
be used for an attitude indicator, but I haven't seen this done.

Thanks,
Eric Bartsch
1959 Pilatus P-3 A-848
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  #2  
Old April 12th 08, 11:40 PM posted to rec.aviation.owning
Mike Murdock
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Posts: 21
Default Backup attitude indicator on older Cirrus

Eric,

If you look at the Cirrus web site (http://www.cirrusdesign.com), you can
find pictures of Cirrus panels with PFDs.

On those panels, they mount a full size backup attitude indicator in the
padded bolster below the instrument panel.

Also, as far as I know, every pre-PFD Cirrus was delivered with an HSI, not
a DG. Some had a Century HSI, others had a Sandel 3308 EHSI.

Regards,

-Mike

wrote in message
...
Has anyone seen an installation of a backup attitude indicator in an
older Cirrus without the PFD? Every panel I've seen has the same
layout, and there doesn't appear to be any extra space. It looks like
an HSI could be installed and the space for the CDI/Glideslope could
be used for an attitude indicator, but I haven't seen this done.

Thanks,
Eric Bartsch
1959 Pilatus P-3 A-848


  #3  
Old April 13th 08, 12:36 AM posted to rec.aviation.owning
[email protected][_1_]
external usenet poster
 
Posts: 28
Default Backup attitude indicator on older Cirrus

Mike,

Thanks for the response, I am focusing on the pre-PFD aircraft and I
still have yet to find an example with a backup AI. All of the pre-PFD
Cirrus aircraft I have seen have a full panel with no extra space
whether or not they have either HSI option installed (some have only a
DG and no HSI, some have a conventional HSI and some have the
Sandel).

A few examples of pre-PFD SR-20s:

http://www.controller.com/listings/a...137685CD66D817
http://www.controller.com/listings/a...137685CD66D817
http://www.controller.com/listings/a...137685CD66D817
http://www.controller.com/listings/a...137685CD66D817
http://www.controller.com/listings/a...137685CD66D817
http://www.controller.com/listings/a...137685CD66D817

I find it odd that I haven't been able to find a pre-PFD Cirrus with a
backup attitude indicator anywhere, given the popularity of installing
electric backup AIs for redundancy in IFR. I've looked at 25+ aircraft
on the internet and haven't found a single example of a backup AI. Of
course Cirrus fixed this with the PFD versions that have backup
instruments below the PFD, since they were required to have a backup.

Does anyone know if there is a reason why backup AIs aren't found as a
retrofit on older Cirrus? They have really restricted flexibility with
the limited panel space available, but I would have thought somebody
would have gotten creative and found a solution.

Thanks,
Eric Bartsch
1959 Pilatus P-3 A-848


On Apr 12, 6:40*pm, "Mike Murdock" wrote:
Eric,

If you look at the Cirrus web site (http://www.cirrusdesign.com), you can
find pictures of Cirrus panels with PFDs.

On those panels, they mount a full size backup attitude indicator in the
padded bolster below the instrument panel.

Also, as far as I know, every pre-PFD Cirrus was delivered with an HSI, not
a DG. *Some had a Century HSI, others had a Sandel 3308 EHSI.

Regards,

-Mike

 




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